Pressure-regulator for steam-boilers



A. SCHOLZ.

PRESSURE REGULATOR FOR STEAM BOILER$.

APPLICATION FILED NOV. 5. 1919.

1,372,200. Patented Mar. 22,1921

:. INVENTOR AON EY PATENT OFFICE.

ADOLF SCHOLZ, OF NEW YORK, N. Y.

PRESSURE-REGULATOR FOR STEAM-BOILERS.

Specification of Letters Patent.

Patented Mar. 22, 1921.

Application filed November 5, 1919. Serial No. 335,799.

To all whom 2'23 may concern:

Be it known that I Aoonr Scnopz, a citizen of the United btates, andresident of the city of New York, in the county of New York and State ofNew York have invented a certain new and useful lressure- Regulator forSteam-Boilers, of which the following is a specification.

This invention relates to devices that are utilized for automaticallyregulating the pressure of steam boilers, and particularly to the typeof regulator which is operated by the pressure of the steam generated bythe boiler in connection with which it is installed, and the damper andair doors of which it controls to cause generation of the steam at auniform pressure. l

The principal object of my invent on is to provide a simple,inexpensive, efiiciently operating and improved automatic pressureregulator for steam boilers, of the above stated type, which may beinstalled conveniently and economically, and which when in operation mayat all times be readily, rapidly, and conveniently set to accuratelycontrol the damper and air doors of the boiler for generating the steamat any predetermined pressure desired.

Other objects and advantages Wlll hereinafter appear.

I11 the accompanying draw1ngs,-

Figure 1 shows an elevation of the pressure regulator, partly insection.

Fig. 2 is a plan view of the regulator shown in Fig. 1.

Fig. 3 is a side elevation of the regulator, on a reduced scale.

The cylinder 1 of the regulator is closed at the lower end thereof by ahead 2 and at its upper end by a head 3, which heads are secured inplace by bolts 4 in the usual manner. A piston 5 located in the eyllnder1 is slidable upwardly and downwardly therein and is secured to a rod 6,which extends upwardly therefrom and passes through a centrally locatedhub 7 that forms part of the head 3 andserves as a guide for the rod. Apipe 8 passes through the lower head 2 to which it 1s secured and fromwhich it extends over to the steam portion of the boiler, not shown, inconnection with which the regulator is installed, whereby the steam frdmthe boiler enters the lower part of the interior of the cylinder 1,between the piston 5 and the head 3. Above the head 3 is lorated asleeve 9 which embraces the rod 6 and is therefore adjustable upwardlyand downwardly therealong, and a set screw 10 passes through the sleeve9 and serves to secure said sleeve to the rod at any position to Whichit may be adjusted. lhe rod 6 passes through a central opening 11 formedin a flatmetal crossbar 12, whereby said bar is slidable upwardly anddownwardly along the rod, and a spring 13 is located between the bar 12and the sleeve 9 and is coiled around said rod. Two bolts 1 1 secured tothe head 3 extend therefrom upwardly and pass through openings formed111 the extremities of the cross-bar 12, and thumb-nuts l5 thread oversaid bolts against the top surface of said cross-bar. A rockshaft 1.6 ismounted in a pair of bearings 17 secured to said head by means of screws18. Said shaft carries a lever 19 keyed thereupon between the bearings17 and is provided with a pin 20 that enters a forked extension 21formed upon the sleeve 9. To the extremity 22 of the rock-shaft 16 issecured an arm 23 which is pivotallyjoined to a series of links 24 thatis in turn joined to the ash-pit doors of the boiler, while to theopposite extremity 25 of said shaft is secured a similar arm 26, whichis pivotally joined to a series of links 27 that is in turn joined tothe damper of the boiler. A blow out valve 28 serves to dis charge anysteam that may accumulate on the upper side of the piston 5 throughleakage.

In the operation of this pressure regulator, steam is first generated inthe boiler until it is brought up to a certain desired pres sure, as canbe ascertained from the pressure gage of the boiler. Steam at saidpredetermined pressure thereupon enters the cyl- V inderl through thepipe 8 and forces the piston 5 upwardly. The thumbscrews 15 are thenthreaded downwardly to force down the bar 12 and thereby compress thespring 13 against the sleeve 9 secured to piston-rod 6, until the springexerts a downward pressure upon the rod 6 equal to the upward pressureexerted by the steam-pressed piston 5. Under this conditionthespring'and steam pressures upon the opposite sides of the piston 5equalize and tend to maintain said piston at about midway between thecylinder heads 2, 3, while the series of links 24, 27 are so connectedto the ash-pit doors and damper respectively that they maintain thesepartially open, so as to create just sufficient draft to heat thefurnace to a temperature capable of generating steam at the desiredpredetermined pressure.

Should the steam pressure in the boiler now mount higher than required,it would cause the piston 5 to rise and thereby move the rod 6 with itssecured sleeve 9 upwardly contrary to the pressure of spring 13, and thesleeve 9 moving upwardly would swing the lever 19, through the slidableand pivoted coactionof the pin 20 of the latter with the forked end 21of the former, and rock the shaft 16, which would cause the arms 23, 26to swing in a clockwise direction, as viewed in the drawing. Saidmovement of the arms 23, 26 would thereupon be transmitted to the links24, 27 which would actuate the ash-pit doors and damper to close fullyor partially more, to shut off or reduce the draft, in which manner thetemperature of the furnace would be lowered and the seam pressureconsequently reduced until it would be restored to that normallyrequired. Should the steam pressure in the boiler thereafter drop belowthe amount required, the opposite operation would take place and thepiston 5 would sink under exertion of the spring 13, and the sleeve 9would thereupon swing the lever 19 and rock the shaft 1.6 oppositely andswing the arms 23, 26 in a counterclockwise direction. The movement ofsaid arms would then actuate the links 24', 27 to open the ash-pitdoorsand damper more fully, increase the draft and temperature of thefurnace, and consequently raise the steam pressure in the boiler to thepredetermined extent required. In

, this manner the pressure regulator will operatecontinually while theboiler is in operation to automatically open and close the air-doors anddamper and thereby maintain the steam in the boiler at the uniformdesired pressure. In case it should be desired to operate the boiler togenerate a higher or lowersteam pressure the regulator may be reset forsuch purpose in the above described manner, 6. 0., the steam may beraised to the pressure required as indicated by the gage, aild the nuts15 maybe threaded to adjust the power spring 13 to just balance theupward pressure exerted against the piston 5 by the steam, after whichthe regulator will continue'to function under its reset conshaftlt} toalter their angularity, and then retightening said screws. Furthercompensation for such purpose may be made by unthreading the set-screws10 and therewith adjusting the position of the sleeve 9 along the rod 6to a different elevation, to thereby alter the angularity of swinging ofthe arms 23, 26. It will be evident that with the aforesaid adjustmentsthe pressure rogulaof the rock-shaft 1G, and the transmission thereto ofthe movement of the piston-rod 6 through the slidable and pivotal joint20, 21 the pressure regulator is rendered highly responsive to varyingsteam pressures in the boiler and is greatly conducive to very eliicientoperation ol" the regulator, since said rock-shaft is capable ofimparting a large throw to the arms 23, 26 and thereby amplifies thecomparatively small movement of the piston 5 to a much larger movementof the said doors and damper. The regulator has been thus found to beresponsive with complete accuracy to controlling uniformly steampressures as low as two pounds. It will be further evident that, ifdesired, the regulator may be operated to control the damper only,leaving the control of the ashpit doors entirely optional with the user,in which case all that is required is removal of the arm 23 from theapparatus, by unthrcading its set-screw l8.

Variations may be resorted to within the scope of the invention andportions of the improvements may be used without others.

Having thus described my invention, 1 claim 1. A pressure regulator forsteam boilers having the combination with a cylinder, a piston thereinactuated by the steam from the boiler, and connections joining thedamper and air door of the boiler with the rcgulator, of a head for saidcylinder secured thereto, a piston-rod passing through said head andguided thereby, a sleeve adjustable along said rod, means to secure saidsleeve to the rod in any adjusted position, a crossbar through whichsaid rod is slidublc, :1 spring located between said sleeve and said barsurrounding said rod. :1 pair of bolts secured to said head passingthrough said bar, nuts threading over said bolts bearing against saidbar to regulate the pressure of said spring against said sleeve, arock-shaft mounted upon said head, a lever extending from said shaftjoined pivotally and slidably to said sleeve, arms extending from saidshaft joined pivotally to said connections, and means to adjust theangularity of said arms relatively to said shaft.

2. A pressure regulator for steam boilers till li 'O llh having thecombination with a cylinder, a piston therein actuated by the steam fromthe boiler, and connections joining the damper and air door of theboiler with the regulator, of a head for said cylinder secured thereto,a piston-rod passing through said head and guided thereby, a membersecured to said rod, a cross-bar through which said rod is slidable, aspring located between said member am and ear surrounding said 1.0a,

a pair of bolts secured to said head passing through said bar, nutsthreading over said bolts bearing against said bar to regulate thepressure of said spring against said member, a rock-shalt mounted uponsaid head, a lever extending from said shaft joined pivotally andslidably to said member, and arms extending from said shaft joinedpivotally to said connections. V

3. A pressure regulator for steam boilers having the combination with acylinder, a piston therein actuated by the steam from the boiler, andconnections joining the damper and air doorof the boi er with theregulater, of a head for said cylinder secured thereto, a piston-rodpassing tl'irougl said head and guided thereby, a member secured to saidrod, a cross-bar through which said rod is slidable, a spring locatedbetween. said member and said bar surrounding said rod, apair of boltssecured to said head passing through said'bar, nuts threading over saidbolts bearing against said bar to regulate the pressure of said springagainst said member, a rock-shaft mounted upon, said head, a leverextending from said shaft joined pivotally and slidably to said member,and means to join said shaft with said connections.

i. A. pressure regulator for steam boilers having the combination with acylinder, a piston therein actuated by the steam from the boiler, andconnections joining the damper and air door of the boiler with theregulator, of a head for said cylinder secured thereto, a piston-rodpassing through said head and guided thereby, a member secured to saidrod, a cross-bar through which said rod is slidable, a spring locatedbetween said member and said bar surrounding said rod, a pair of boltssecured to said head i iassing through said bar, nuts threading oversaid bolts bearing against said bar to regulate the pressure of saidspring against said member, a roclr-shaft mounted upon said head, meansto transmit the movement or" said member to said shaft, and means tojoin said shaft with said connections.

5. A pressure regulator for steam boilers having the combination with acylinder a piston therein actuated by the steam from the boiler, andconnections joining the clamper and air door of the boiler with theregulater, of a head for said cylinder secured thereto, a piston rodpassing through said head and guided thereby, a member secured to saidrod, a spring surroundnig said rod bearing against said member, meanscoopcrating with said rod to regulate the pressure of said springagainst said member, a rock-shaft mounted upon said head, means totransmit movement of said member to said roclr-sl1aft,and means joiningsaid shaft with said connections.

(3. 1h. pressure regulator for steam boilers having the combination witha cylinder, and a piston therein actuated by the steam from the boiler,of a piston rod, a sleeve adjustable aloug said rod, means to securesaid sleeve to the rod in any adjusted position, a crossbar throughwhich said rod is slidable, a spring located between said sleeve andsaid bar surrounding said rod, a pair of fixed bolts passing throughsaid bar, nuts threading over said bolts bearing against said bar toregulate the pressure of said spring agaii'lst said sleeve, a rock-shaltmounted in fined bearings, a lever fixed to said shaft joined pivotallyand slidably to said. sleeve, and means to transmit the actuation ofsaid shaft to the damper and air doors of the boiler.

7. A pressure regulator for steam boilers having the combination with acylinder, and a piston therein actuated by the steam from the boiler, ofa piston rod, a member secured to said rod, a crossbar through whichsaid rod is slidable, a spring located between said member and said barsurrounding said rod, a pair of fixed bolts passing through said bar,nutsthreading over said bolts bearing against said bar to regulate thepressure of said spring against said member, a rockshatt mounted infixed bearin s, a lever fixed to said shaft joined pivotall y andslidably to said member, and means to transmit the actuation of saidshaft to the damper of the boiler.

8, A pressure regulator for steam boilers" the boiler, of a piston rod,a member secured to said rod, a cross-bar through which said rod isslidable, a spring located between said member and said bar surroundingsaid rod, a pair of fixed bolts passing through said bar, nuts threadingover said bolts bearing against said bar to regulate the pressure ofsaid spring against said member, a rockshattt mounted in fixed bearings,means to transmit the movement of said member to said shaft, and meansto transmit the actuation ol said shaft to the damper and air doors ofthe boiler.

9. A pressure regulator for steam boilers having the combination with acylinder, and

a piston therein actuated by the steam from cross-bar throu h which saidrod is slidable, a spring locatecfbetween said sleeve and said barsurrounding said rod, a pair of fixed bolts passing through said bar,nuts threading over said bolts bearing against said bar to regulate thepressure of said spring against said sleeve, and means to transmit theactuation of said sleeve to the damper of the boiler.

10. A pressure regulator for steam boilers having the-combination with acylinder, and a piston therein actuated by the steam from the boiler, ofa piston rod, a member secured to said rod, a spring surrounding saidrod bearing against said member, means 00- operating with said rodtoregulate the pressure of said spring against said member, a rock-shaftmounted in fixed bearings, means to transmit the movement of said memberto said shaft, and means to transmit the actuation of said shaft to thedamper of the boiler.

11. A pressure regulator for steam boilers having the combination withacylinder, and a piston therein actuated by the steam from the boiler, ofa piston rod, a member secured to said rod, a spring surrounding saidrod bearing against said member, means movable along said rodcooperating therewith to regulate the pressure of said spring againstsaid member, a rocleshaft mounted in fixed bearings, means to transmitthe movement of said member to said shaft, and means to transmit theactuation of said shaft to the damper of the boiler.

12. A pressure regulator for steam boilers having the combination with acylinder, and piston therein actuated by the steam from the boiler, of apiston rod, a member adjustable along said rod, means to secure saidmember to said rod in any adjusted position, a spring surrounding saidrod hearing against said member, means movable along said rodcooperating therewith to regulate the pressure of said spring against 1said member, a rock-shaft mounted in fixed bearings, means to transmitthe movement of said member to said shaft, and means to transmit theactuation of said shaft to the damper of the boiler.

Signed at the city of New York, in the county of New York, and State ofNew York, this 3rd day of November, A. D. 1919.

ADOLF SCHOLZ.

